how can I collect all possible combinations of two numbers from a data set in matlab ?

Dear All,

I have a matrix, like the one s below:

A=[1 2 4 8 16 32];

I want to collect all the possible cases of chossing two array from the above matrix and then have the sum of these values. like below:

1+2=3;

8+32=40;

2+16=18;

How is it possible to access all the possibe combination of two array from a matrix?

I appreciate your support in advance.

Answer 1

[DGM]

Something like this:

A = [1 2 4 8 16 32];
k = 2;

B = nchoosek(A,k)
C = sum(B,2)

Be aware how fast the size of B will increase as the length of A increases. For A of length N, B will have N!/(k!*(N-k)!) rows.

[R@SH]

thanks you so much dear DGM